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HelpTest Code VB12 Vitamin B12
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 3 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
Specimen Condition
| Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | |
|---|---|
| 5 days – < 1yr | 191 – 1,163 pmol/L |
| 1 – 8 yrs | 209 – 1,190 pmol/L |
| 9 – 13 yrs | 186 – 830 pmol/L |
| 14 – 16 yrs | 180 – 655 pmol/L |
| 17 – 18 yrs | 150 – 599 pmol/L |
| ≥ 19 yrs | 138 – 652 pmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of pernicious anaemia. Increased levels are seen in hepatic cell damage and myeloid leukemia.
Update
Last updated 11/03/2025
Service Code
31732
Laboratory Code
LAB67
LOINC Code Information
14685-2